With my stock 01 zx3 I consistently see about 30-32 mpg, 60%HW, 40% city. I think I could do a bit better because the tires are very old and there is that part throttle stumble that still needs to be fixed. I did notice that switching to 0-20 synthetic improved mileage by about 2 mpg, I also keep the stock 205--50-16s on the firm side and shift below about 2500 unless I'm in flog mode. My sister says she gets about 34mpg in her 04 zx3 without trying to hard. My ex would consistently only get 22.6 mpg in her 03 GTi vr6/6spd, that car would blow the doors off my hamster powered Ford but I swear you could see the gas guage plummet every time you got on it.